Process of manufacturing magnesium perborate.



borate 'melted in the Water bath. at a temperature UsrrEn erases oi iiicn;

WALTER WEBER, O DUSSELDORE, GERMANY. ASSIGNOR TO THE FIB-M OF HENKEL 8:

CIEl, OF DUSSELDOE-F, GERMANY.

PROCESS OE MANUFACTURING Iv'ZAGNESIUM PERBORATE.

N0 Drawing.

To aZZ whom it may concern Be it known that l, Home \l'csnn, a citi- Zen of the German Empire, and residing at Dusseldorf, Germany, have invented a certain new and useful Improved Process of Manufacturing Magnesium Perborate, of which the following is a specification.

The subject-matter of this invention is an inierovc l process of manufacturing magnesium perboratei I have found that it is possible to make a magnesium perhorate of constant chemical composition. and good solubility Without any technical difiiculty by melting oiagne sium salts with alkali metal perborate. 0f the magnesium salts those are suitable for use Whose anions form with the alkali metal of the perborate salts containingivater of crystallization. .l

Example: 1 molecular proportion of magnesium sulphate (lllgSOgTHQ) is mixecl with molecular proportions of sodium per-- (llaB0 l-LO), the mixture is of 65 to- ?0 C. and maintained for a time at this temperature while being stirred. Cn

v cooling the mass congeols, can be readily cut into small pieces and after being completely clrietl can be pulverized. The yield according to the described process is almost quantitatiye a'nil the stability of the product is'excellent,

The advantages of the process are, on the one hand, its exceedingly great simplicity antll short cluration and, on theother hand, the constant chemicfl conipositicn of the resulting final products, whereby the uniformity of their properties is guaranteed, which is of great importance particularly in the case of a body containing active oxygen. Also, for most purposes of employment the solubility of the magnesium fierborate *htainetl by the present process, WhlCl'l l"; FBYQI is considerably less than that of alkali metal perborate, is of advantage Further. the magnesium perborauobtained is specially suitable for pharmaccutical and cosmetic purposes owing to its stability, slight alkalinity,and to its high percent age of oxygen which admits oi the a lmix- 'ture of relatively large quantities of other substances Without causing the I degree of concentration of active oxygen to become too low', and also owing to the lack all taste.

To produce ma aesium perborate by Specification of Letters Patent Application filed February 8, 19 14.

nesium sulfate iateritetl Jan. 5, 1915.

Serial rm 317,700,

a magnesium salt in water is already known.

ln this conversioin however, a strong (lecomposition occurs owing to the presence of excess water whereby a considerable part of the valuable active oxygen is lost Further losses arise through me subsequent filtrat on treatment by centrifugal force, or drying of the perbo ates obtained in the Wet process. Such losses are avoided by the present invention which comprises a simple fusion process. Furthermore, a more stable final prmluct is obtained by this fusion process, the contents of which in active oxygen are comparatively constant. The present process therefore not only simpler but the yield thereof is greater and more certain.

l claim 1 l. A process oi u'ianutacturing magnesium perborate consisting in melting an alkali metal perborate with a magnesium salt whose unions are able to form ii'ith the alkali metal of the perborate. salts containing Water of crystallization.

A more: ol" munu'hicturing magnes utn imliml'zlll consisting in melting and siuuiltanemisli' stirring" a alkali metal perborate with a magnesium salt whose anions are able-to f rm with the alkali metal of the perlmrate. containing water of crvstal lizationf i A process siuni perborate of manufzu'turingmagne consisting in melting magu'ilh an alkali metal perborate While constantly stirring the same.

4-. A process of imiuutzuturing magnesium perborate ctmsistinsr in melting sodium perioratc with a nmgucsiuiu salt \vliose anions are able to form with the alkali metal of the pcrboratc. salts containing water of erystallimilou.

A g -roress o'l' mauul'mfiming magnesium prrbo 'u cruusisliirr in melting magnesuuu su utc with sodium pcrborute While constantly stirring the same,

(1A pltu'm zs o! manulecturing maimeslum p'erborale consisting in mixing tivo molecular gmumrtions ol an ulli'ali metal perboratc with one molecular proportion of a uni rucsium salt whose unions are able to form with the alkali metal 01"- the perborute salts containing" water of crystallization, in melting the mixture at temperature of from 65 to T( C. anil in maintaining: it at this temperature for a time while stirring the same, and in then allowing the molten mix- While stirring the same and in then allow 1:.

ture to cool. ing the molten mixture to cool.

7. A process of manufacturing magne- In testimony whereof, I afiix my signature siuin' qerbotate consistfing in mixing one in the presence of two witnesses. m0 ecu a1 proportion 0' ma nesium sulfate v with two molecular proportiions of sodium WALTER WEBER perborate, in melting the mixture at a tem- Witnesses: perature of from 65 to 70? C. and in main- HELEN NUFER,

taining it at this temperature for a time ALBERT NUFER 

